Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [189,4,Mod(1,189)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(189, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 0]))
N = Newforms(chi, 4, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("189.1");
S:= CuspForms(chi, 4);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 189 = 3^{3} \cdot 7 \) |
| Weight: | \( k \) | \(=\) | \( 4 \) |
| Character orbit: | \([\chi]\) | \(=\) | 189.a (trivial) |
Newform invariants
comment: select newform
sage: f = N[0] # Warning: the index may be different
gp: f = lf[1] \\ Warning: the index may be different
| Self dual: | yes |
| Analytic conductor: | \(11.1513609911\) |
| Analytic rank: | \(1\) |
| Dimension: | \(2\) |
| Coefficient field: | \(\Q(\sqrt{3}) \) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{2} - 3 \)
|
| Coefficient ring: | \(\Z[a_1, a_2]\) |
| Coefficient ring index: | \( 1 \) |
| Twist minimal: | yes |
| Fricke sign: | \(-1\) |
| Sato-Tate group: | $\mathrm{SU}(2)$ |
$q$-expansion
comment: q-expansion
sage: f.q_expansion() # note that sage often uses an isomorphic number field
gp: mfcoefs(f, 20)
Coefficients of the \(q\)-expansion are expressed in terms of \(\beta = \sqrt{3}\). We also show the integral \(q\)-expansion of the trace form.
Embeddings
For each embedding \(\iota_m\) of the coefficient field, the values \(\iota_m(a_n)\) are shown below.
For more information on an embedded modular form you can click on its label.
comment: embeddings in the coefficient field
gp: mfembed(f)
| Label | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1.1 |
|
−4.73205 | 0 | 14.3923 | −9.92820 | 0 | 7.00000 | −30.2487 | 0 | 46.9808 | ||||||||||||||||||||||||
| 1.2 | −1.26795 | 0 | −6.39230 | 3.92820 | 0 | 7.00000 | 18.2487 | 0 | −4.98076 | |||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(3\) | \( +1 \) |
| \(7\) | \( -1 \) |
Inner twists
This newform does not admit any (nontrivial) inner twists.
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 189.4.a.e | ✓ | 2 |
| 3.b | odd | 2 | 1 | 189.4.a.i | yes | 2 | |
| 7.b | odd | 2 | 1 | 1323.4.a.o | 2 | ||
| 21.c | even | 2 | 1 | 1323.4.a.x | 2 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 189.4.a.e | ✓ | 2 | 1.a | even | 1 | 1 | trivial |
| 189.4.a.i | yes | 2 | 3.b | odd | 2 | 1 | |
| 1323.4.a.o | 2 | 7.b | odd | 2 | 1 | ||
| 1323.4.a.x | 2 | 21.c | even | 2 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{4}^{\mathrm{new}}(\Gamma_0(189))\):
|
\( T_{2}^{2} + 6T_{2} + 6 \)
|
|
\( T_{5}^{2} + 6T_{5} - 39 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{2} + 6T + 6 \)
|
| $3$ |
\( T^{2} \)
|
| $5$ |
\( T^{2} + 6T - 39 \)
|
| $7$ |
\( (T - 7)^{2} \)
|
| $11$ |
\( T^{2} + 48T - 192 \)
|
| $13$ |
\( T^{2} - 52T - 1052 \)
|
| $17$ |
\( T^{2} + 30T - 2127 \)
|
| $19$ |
\( T^{2} - 64T - 9776 \)
|
| $23$ |
\( T^{2} + 60T - 12972 \)
|
| $29$ |
\( T^{2} + 360T + 28512 \)
|
| $31$ |
\( T^{2} + 140T - 10652 \)
|
| $37$ |
\( T^{2} + 230T - 2327 \)
|
| $41$ |
\( T^{2} + 234T - 111159 \)
|
| $43$ |
\( T^{2} + 938T + 219529 \)
|
| $47$ |
\( T^{2} + 618T + 2553 \)
|
| $53$ |
\( T^{2} - 420T - 233148 \)
|
| $59$ |
\( T^{2} + 282T + 681 \)
|
| $61$ |
\( T^{2} + 32T - 248576 \)
|
| $67$ |
\( T^{2} - 544T - 65984 \)
|
| $71$ |
\( T^{2} - 504T + 20304 \)
|
| $73$ |
\( T^{2} + 764T - 124076 \)
|
| $79$ |
\( T^{2} - 238T - 860639 \)
|
| $83$ |
\( T^{2} - 522T - 491751 \)
|
| $89$ |
\( T^{2} + 708T - 246396 \)
|
| $97$ |
\( T^{2} - 664T - 45728 \)
|
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